TONIGHT: There's a lot on the schedule! We've got new episodes of Mike & Molly, Chase, Hawaii Five-0, Dancing with the Stars, How I Met Your Mother, Chuck, House, 90210, Gossip Girl, The Event, Lie to Me, and much more!

8:00 PM

Dancing with the Stars The ninth week of performances. (ABC)
Chuck Worried his relationship with Sarah is souring, Chuck tries to prove his worth by undertaking a perilous assignment with an overly ambitious agent (Rob Riggle). Elsewhere, Buy More staffers delve into Greta's true identity, prompting Morgan and Casey's swift interference. Richard Chamberlain and Summer Glau guest star. (NBC)
House A girl is suspected of having smallpox after a 200-year-old medicine jar found in a shipwreck shatters in her hand, so a CDC doctor (Dylan Baker) locks down the hospital. Martha Masters (Amber Tamblyn) questions his motive for doing so. She also questions the diagnosis. Meanwhile, Wilson and Sam (Cynthia Watros) examine their relationship after they comfort a 6-year-old cancer patient (Devon Woods). (FOX)
90210 Teddy hits a bar in West Hollywood but has to ask Ian for help when he forgets his wallet. Elsewhere, Annie is embarrassed when Charlie's friends spot her wearing lingerie; Debbie and Ryan get very close as she helps him adjust to single parenthood; Navid leans on Silver after exposing his father's business practices; and Adrianna's fame blinds her to Navid's troubles. (CW)
How I Met Your Mother The friends learn more about Robin's past as Canadian teen star "Robin Sparkles," and they encourage her to reunite with her former costar, Jessica Glitter. (CBS)

8:30 PM

Rules of Engagement Russell moves in with Timmy when he's cut off from his trust fund; while Audrey helps Jeff make a good impression on his boss. (CBS)

9:00 PM

Gossip Girl Chuck throws a masquerade party at his hotel, where Serena behaves erratically and baffles Dan and Nate. Meanwhile, Blair tries to impress Anne Archibald so she can get involved in her foundation, but Blair's association with Chuck works against her. (CW)
The Event Martinez interrogates Buchanan about the assassination attempt himself, and learns something about someone on his staff; Dempsey sends Vicky on a new mission; Sean and Leila try to stay one step ahead of the covert operatives who are seeking to silence them. (NBC)
Lie to Me Cal goes head-to-head with a self-help guru (David Sutcliffe) to free a wealthy woman (Julia Campbell) who might be under his control. Cal also suspects the group of threatening him and Emily. (FOX)
Two and a Half Men Berta takes a few days off and Charlie falls for the woman who replaces her. (CBS)

9:30 PM

Mike & Molly Molly is jealous when Mike refers to her as his "friend" in front of a woman who's flirting with Mike. (CBS)

10:00 PM

Castle An astrophysicist is found dead in her car, and the investigation leads Castle and Beckett to the possibility of an alien abduction. Meanwhile, a shady government agent (Lyle Lovett) tries to put an end to the pair's probe. (ABC)
Chase When a vicious serial killer escapes prison and goes on a murder spree, Annie's only hope of catching him is through the cooperation of a jailed fugitive. The case takes a surprising turn when the squad realizes the killer's final target isn't who she appears to be. (NBC)
Hawaii Five-0 An infamous dictator becomes an assassin's target when he visits the islands. Five-0 must protect him while also investigating the murder of a security guard involved with the visit who apparently knew details of the planned assassination. (CBS)

Who's on the Late Night Couches Tonight?

Conan LL Cool J, B.J. Novak, Sharon Jones & the Dap-Kings (TBS)
The Daily Show Marion Jones (Comedy Central)
The Colbert Report David Stern (Comedy Central)
Jimmy Kimmel Live!: Kathy Griffin, Miranda Cosgrove, Jason Aldean (ABC)
The Tonight Show with Jay Leno Russell Crowe, Anna Torv, Annie Lennox (NBC)
Lopez Tonight: Sheryl Crow, Manny Pacquiao (TBS)
Chelsea Lately Monica Potter, Josh Wolf, Greg Proops, Natasha Leggero (E!)
Late Night with Jimmy Fallon: Daniel Radcliffe, Quincy Jones, Grinderman (NBC)
Late Show with David Letterman: Emma Watson, Scott Caan, Rascal Flatts (CBS)
Late Late Show with Craig Ferguson: Dennis Miller, Bianca Kajlich (CBS)